Today in our environmental science lecture, we'll discuss the impact of urban green spaces. A recent study in Melbourne found that parks can reduce local temperatures by up to 4 degrees Celsius during heatwaves. However, the effect depends on the size and vegetation density. Small gardens with scattered trees have minimal cooling, while large connected parks with dense canopy and water features create significant cooling zones. The study also noted that residents living within 500 meters of such green areas reported better sleep quality and lower stress levels. Interestingly, the cooling benefit extends only about 300 meters beyond park boundaries, so city planners should prioritize creating multiple medium-sized parks rather than one huge central park.
❓ According to the lecture, what did the study in Melbourne reveal about urban green spaces?
A. A. All types of green spaces reduce temperatures equally.
B. B. Large connected parks with dense vegetation provide the most cooling.
C. C. The cooling effect reaches at least 500 meters from the park.
D. D. Small gardens with trees are more effective than water features.
✅ 正确答案
B. Large connected parks with dense vegetation provide the most cooling.